US7920510B2 - Minimized IP connectivity establishment procedures - Google Patents

Minimized IP connectivity establishment procedures Download PDF

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US7920510B2
US7920510B2 US11125479 US12547905A US7920510B2 US 7920510 B2 US7920510 B2 US 7920510B2 US 11125479 US11125479 US 11125479 US 12547905 A US12547905 A US 12547905A US 7920510 B2 US7920510 B2 US 7920510B2
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ip
terminal
address
station
base
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US20050272481A1 (en )
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Yong-ho Kim
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LG Electronics Inc
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LG Electronics Inc
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00Network arrangements or network protocols for addressing or naming
    • H04L61/20Address allocation
    • H04L61/2007Address allocation internet protocol [IP] addresses
    • H04L61/2015Address allocation internet protocol [IP] addresses using the dynamic host configuration protocol [DHCP] or variants
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L29/00Arrangements, apparatus, circuits or systems, not covered by a single one of groups H04L1/00 - H04L27/00 contains provisionally no documents
    • H04L29/12Arrangements, apparatus, circuits or systems, not covered by a single one of groups H04L1/00 - H04L27/00 contains provisionally no documents characterised by the data terminal contains provisionally no documents
    • H04L29/12009Arrangements for addressing and naming in data networks
    • H04L29/12207Address allocation
    • H04L29/12273Address allocation involving timing and renewal aspects
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L29/00Arrangements, apparatus, circuits or systems, not covered by a single one of groups H04L1/00 - H04L27/00 contains provisionally no documents
    • H04L29/12Arrangements, apparatus, circuits or systems, not covered by a single one of groups H04L1/00 - H04L27/00 contains provisionally no documents characterised by the data terminal contains provisionally no documents
    • H04L29/12009Arrangements for addressing and naming in data networks
    • H04L29/12792Details
    • H04L29/1283Details about address types
    • H04L29/12839Layer 2 addresses, e.g. Medium Access Control [MAC] addresses
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00Network arrangements or network protocols for addressing or naming
    • H04L61/20Address allocation
    • H04L61/2053Address allocation involving timing or renewal aspects
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00Network arrangements or network protocols for addressing or naming
    • H04L61/60Details
    • H04L61/6018Address types
    • H04L61/6022Layer 2 addresses, e.g. medium access control [MAC] addresses
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M1/00Substation equipment, e.g. for use by subscribers; Analogous equipment at exchanges
    • H04M1/253Telephone sets using digital voice transmission
    • H04M1/2535Telephone sets using digital voice transmission adapted for voice communication over an Internet Protocol [IP] network
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M1/00Substation equipment, e.g. for use by subscribers; Analogous equipment at exchanges
    • H04M1/72Substation extension arrangements; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selecting
    • H04M1/725Cordless telephones
    • H04M1/72519Portable communication terminals with improved user interface to control a main telephone operation mode or to indicate the communication status
    • H04M1/72522With means for supporting locally a plurality of applications to increase the functionality
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATIONS NETWORKS
    • H04W36/00Handoff or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0011Control or signalling for completing the hand-off for data session or connection
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATIONS NETWORKS
    • H04W8/00Network data management
    • H04W8/26Network addressing or numbering for mobility support
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATIONS NETWORKS
    • H04W80/00Wireless network protocols or protocol adaptations to wireless operation, e.g. WAP [Wireless Application Protocol]
    • H04W80/04Network layer protocols, e.g. mobile IP [Internet Protocol]

Abstract

For a broadband wireless access system, a method of configuring an IP address for a fixed/mobile station that changes from idle mode to receiving mode or when performing handover such that IP address configuration procedures are simplified. The base station determines whether the mobile station that changes from idle mode to receiving mode or performs handover needs to re-configure its IP address, and informs this to the mobile station, which can then selectively configure its IP address according to the needs of configuring its IP address.

Description

CROSS REFERENCE TO RELATED APPLICATIONS

The present application claims the benefit of Korean patent application number 10-2004-041597 filed Jun. 8, 2004 and Korean patent application number 10-2005-038142 filed May 6, 2005, the disclosure of which is incorporated herein by reference, and the benefit of U.S. provisional application No. 60/569,238 filed May 10, 2004, U.S. provisional application No. 60/570,836 filed May 14, 2004, U.S. provisional application No. 60/571,537 filed May 17, 2004, and U.S. provisional application No. 60/577,186 filed Jun. 7, 2004, the disclosures of which are incorporated herein by reference.

BACKGROUND ART

The present invention relates to broadband (wideband) wireless (radio) access systems, in particular, to a method of simplifying the IP address configuration (establishment) procedures when a mobile/fixed terminal in idle mode changes to receiving mode or when performing handover.

In general, in a broadband wireless access system, an idle mode for a mobile (or fixed) terminal (e.g., mobile station, mobile subscriber station (MSS), user terminal, user equipment (UE), etc.) is supported in order to minimize power consumption. In idle mode, a ‘paging zone’ is defined as the entire region that is handled by a plurality of bases station called a ‘paging group’ and all base station included within the same paging zone have the same paging cycle value (Paging_Cycle) and paging offset value (Paging_Offset).

The terminal may request to the base station for changing into idle mode, and the base station delivers its paging zone identification (Paging-group ID) and the paging cycle and paging offset associated thereto to the terminal to allow that terminal to change into idle mode state. During the idle mode, the terminal can determine whether to maintain or end its idle mode based upon the paging that is delivered in broadcast format from the base station at each paging period.

Additionally, when there is traffic (e.g., data, packets, etc.) that needs to be delivered by the terminal in idle mode, the terminal may end its idle mode at any time. Also, when a terminal in idle mode does not receive paging within a set period of time due to reasons such as moving into another paging zone, losing synchronization, etc., then the terminal ends its idle mode.

When data traffic to be delivered to the terminal in idle mode is generated, the base station can make the terminal end its idle mode through paging. In such situations when traffic to be forwarded is generated for the terminal, the base station delivers an action code to enter network.

In this situation or when the terminal has data to be sent on the uplink, the terminal performs IP address configuration (establishment) procedures. If the network prefix used by the base station that received the paging did not change and remains the same, the above procedures could be omitted, but such omission is not possible because a procedure for performing network prefix comparison is not provided by the related art.

The idle mode can be comprised of the following operations and steps.

    • start idle mode by mobile terminal
    • cell selection
    • synchronization of paging message broadcast time of terminal
    • terminal paging unavailable cycle
    • terminal paging listening period
    • base station paging broadcast message transmission period
    • base station broadcast message
    • end paging available mode

Among these, the technique related to the present invention is the base station paging broadcast message.

The base station paging broadcast message is a message sent via the base station or a different network element for informing a particular mobile terminal that currently delayed downlink traffic exists. This paging broadcast message must be transmitted through a broadcast connection identifier (CID) during a base station paging broadcast message transmission time period, and should be transmitted during the transmission time period regardless of the number of mobile terminals that require paging.

The base station paging broadcast message should be able to include one or more paging group IDs that indicate the logical classification of the base station that transmits. Regarding the base station paging broadcast message, the mobile terminals are distinguished by the mobile terminal MAC address hash, and a single base station paging broadcast message can include a plurality of MAC addresses.

The base station paging broadcast message must transmit an action code with respect to each mobile terminal that is distinguished by mobile terminal MAC address hashes, and such action codes are as follows.

    • 00: no action required
    • 01: perform Ranging to configure location and acknowledge message
    • 10: perform initial network entry
    • 11: reserved

Among the above action codes, the base station paging broadcast message that is transmitted when there is downlink data, transmits an action code ‘10’ and the terminal performs network entry procedures based upon this action code.

Accordingly, in the related art, the mobile terminal must always re-configure (re-establish) its IP address when the mobile terminal in idle mode receives paging from the base station because there is downlink data to be received or when there is uplink data to be sent.

Namely, when a mobile terminal operating in idle mode moves into a different base station region and receives from the base station a paging broadcast message indicating that currently set aside (delayed) downlink data exists, the mobile terminal may omit the IP address configuration (establishment) procedures if the IP Subnet, Prefix, and Access Router (NetID) used by the base station are the same as those previously used by the mobile terminal. Also, when the mobile terminal in idle mode performs registration procedures with the base station because it has data to be sent on the uplink, the base station compares the previously received IP Subnet, Prefix, and Access Router (NetID) used by the mobile terminal with the IP Subnet, Prefix, and Access Router (NetID) that are can be used or are currently being used within the base station, and informs to the mobile station as to whether IP address re-configuration (re-establishment) is needed or not.

However, because the related art does not provide the procedures that can compare the IP Subnet, Prefix, and Access Router (NetID), the mobile terminal had to perform IP address configuration (establishment) procedures each time the idle mode was ended when there was uplink or downlink data, thus causing the problems of unnecessary time delays.

Meanwhile, the process for handover in a broadband wireless access system comprises a pre-processing procedure, a handover procedure, and a ‘drops and corrupted HO attempts’ procedure.

1. Pre-Processing Procedures for Handover

As the pre-processing procedures for handover of IEEE 802.16e, a procedure of informing the mobile terminals by broadcasting from a base station, the information related to neighboring base stations (e.g., Network Topology Advertisement), a procedure of measuring the channel quality of neighboring base stations based upon such information (e.g., MSS scanning of neighbor BS), and a procedure of selectively matching time differences and the like for the neighboring base station and initial terminal power value, as well as for synchronization (e.g., association procedures).

* Network Topology Advertisement

The base station informs all mobile stations within a cell about the information of neighboring base stations by transmitting information related to network constitution information in a broadcasting manner through a MOB_NBR-ADV MAC (Medium Access Control) message.

* MSS Scanning of Neighbor BS

As a mobile terminal must scan (search) neighboring base stations for handover, a scanning interval is requested to the base station through a MOB_SCN-REQ MAC message for scanning neighbor base stations, and the base station transmits a MOB_SCN-RSP MAC message in response to allocate an interval that allows the terminal to scan neighboring base stations. Also, the base station may directly transmit a MOB_SCN_RSP MAC message without any request of the mobile terminal (i.e., unsolicited request). At this time, the scanning interval and offset unit to start scanning that the base station allocates are all allocated in units of frames.

* Association Procedure

The association procedure is a procedure in which the terminal normally joins a cell by performing a ranging procedure with the base station. The associate procedure is performed when the terminal scans the base stations and selects a new base station. A RNG-REQ MAC message is transmitted by the terminal, and the base station transmits a RNG-RSP MAC message to set the power offset value, timing offset value, etc. to the appropriate values.

Transmitting of the RNG-REQ MAC message is referred to as an initial ranging operation, and is one of the most basic operations of an IEEE 802.16 system by which the terminal performs a network entry process. The target base station that receives a new terminal through handover (HO), transmits the matters in association to the cell of the terminal to the serving base station that the terminal was previously a part of, and then stores the information related to the terminal.

2. Handover (HO) Process

Based upon the neighboring base station and channel quality information obtained from the above handover pre-processing procedures, the terminal begins handover.

* Cell Selection

The cell selection operation is an operation of changing a cell in order to newly register with a base station that allows reception of a signal having a better Signal-to-Interference-Noise Ratio (SINR) than the SINR of the signal transmitted from the base station of a current cell before the terminal normally registers with the cell. At this time, the base station has no way of knowing about any movement of the terminal because the terminal has not yet performed any registration procedures.

* HO Initiation

Handover initiation can be performed by either the base station (BS) or the mobile terminal (MSS: mobile subscriber station). Namely, when the base station requests handover, it transmits a MOB_BSHO-REQ MAC message, and when the mobile terminal requests handover, it transmits a MOB_MSSHO-REQ MAC message. If the terminal transmits a MOB_MSSHO-REQ MAC message, the SINR of the signals received from neighboring base stations is transmitted to the base station, and the candidate base stations that can be a target base station during handover are transmitted to the currently serving base station.

The base station receives a MOB_MSSHO-REQ MAC message from the terminal or before the base station itself transmits a MOB_MSSHO-REQ MAC message in order to handover the terminal, the handover of the terminal is allowed after checking the responses (ACK) from neighboring base stations for performing handover of the particular terminal. The terminal or base station that receives the MOB_BSHO/MSSHO-REQ message transmits a MOB_MSSHO/BSHO-RSP MAC message to inform about the target base station that will perform the handover.

* HO Cancellation

After the MOB_MSSHO/BSHO-REQ MAC message is transmitted to allow the terminal or base station to perform handover, the terminal may cancel the handover. Here, the terminal can set a particular field of the MOB_HO-IND MAC message (e.g., HO_Type=01) and transmit such to the base station for canceling the handover that is currently being performed.

* Termination with the Serving BS

By transmitting a MOB_HO-IND MAC message to the serving base station, the terminal informs that handover has been properly completed and finishes the handover operation. Here, the terminal can set a particular field of the MOB_HO-IND MAC message (e.g., HO_Type=00) and transmit such to the serving base station to inform that handover has been properly completed. Upon receiving the MOB_HO-IND MAC message from the terminal, the base station terminates the MAC state machine, ARQ connection, and all connections related to data transmission that were allocated the terminal that has been handed over.

* HO Rejection

The terminal may reject the handover recommended by the base station, and does so by setting a particular field of the MOB_HO-IND MAC message (e.g., HO_Type=10) and transmits to the base station. Upon receiving a rejection message from the terminal, the base station re-constitutes the target base stations and re-transmits a MOB_BSHO-RSP message to the terminal.

3. Drops and Corrupted HO Attempts

If the downlink data received from the base station cannot be reconstructed (recovered, decoded, etc.) or if a RNG-RSP MAC message (with respect to a RNG-REQ MAC message) transmitted to the base station after handover is not properly received and the limit on the number of times that the RNG-REQ MAC message can be transmitted to the base station is reached, the terminal terminates communication. In such case, the terminal re-performs the network entry procedures with the desired target base station to perform an operation for connection recovery.

* Re-Entry with the Target BS

The terminal that performed handover performs a new network entry operation with the target base station, and also performs handover procedures for re-entry with neighboring base stations as well. However, from the point of view of the base station, the re-entry is performed in the same manner as a regular network entry procedure.

* Synchronization with Downlink and Obtain Parameters

The terminal that performed handover detects the downlink signal of the target base station to form synchronization with the base station, and receives a MOB_NBR-ADV MAC message transmitted by the base station to determine the conditions of neighboring base stations. Also, the terminal performs the same procedures as in a regular network entry procedure, namely, the operations to receive the DL_MAP and DCD message are performed.

* Obtain Uplink Parameters

The terminal that performed handover, after obtaining the downlink parameters as described above, receives uplink parameters through reception of a UL_MAP MAC message, a UCD message, etc.

* Ranging and Uplink Parameters Adjustment

The terminal that performed handover attempts to perform ranging with the new base station. This ranging operation is one of the most basic operations in a IEEE 802.16 system, whereby a ranging operation of a competitive allocation method is performed through a ranging opportunity (i.e., an interval allowing transmission of a ranging message) that is allocated by the base station based upon the 48 bit length MAC address of the terminal itself. Through this ranging operation, the terminal receives a new basic ID and a primary management ID allocated from the target base station. This operation achieved as the terminal obtains the uplink parameters by receiving the Fast_UL_Ranging IE that is transmitted by being inserted into the UL_MAP MAC message transmitted by the base station.

Here, the ranging opportunity received for the above ranging operation is performed in a contention-free manner, unlike the initial ranging operation performed for regular network entry.

* MSS Re-Authentication

This is an authentication procedure for normal operation of the terminal, whereby an authentication procedure occurs by using a PKM (Private Key Management) protocol, while the existing security context performs the authentication procedure without any changes.

* Re-Register and Re-Establish Provisioned Connections

The base station is in a state by which the 48 bit MAC address if the terminal has already been received, and since the authentication procedure of the terminal was performed properly, the proper registration procedure of the terminal is performed. The terminal begins the registration process by transmitting a REG-REQ MAC message, and the base station transmits a REG-RSP MAC message to re-establish a provisioned connection of the terminal before handover, to allow proper IP service to be performed.

In general, IP re-configuration (re-establishment) is performed after the mobile terminal performs handover, and IP re-configuration (re-establishment) need not be performed if the IP subnet is the same. However, in the related art, this cannot be known and IP re-configuration (re-establishment) must be done each time the terminal moves. Namely, even if the previous IP address can be used without having to configure (establish) an IP address after the terminal performs handover (for example, when the IP subnet or foreign agent remain the same), IP address configuration (establishment) is always performed after the mobile terminal moves according to the related art.

PURPOSE OF THE INVENTION

The present invention provides a method of configuring (establishing) an IP address of a terminal that simplifies the IP address configuration (establishment) procedures when the terminal in idle mode changed into receiving mode or when handover is performed.

SUMMARY OF THE INVENTION

Instead of having a mobile terminal always perform IP address re-configuration whenever it is associated with a new point of attachment (e.g., performing handover, changing from idle mode to receiving mode, etc.), it is determined if IP address re-configuration is actually necessary by considering whether the previous IP address may still be used or if a new IP address needs to be configured.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 depicts the format of a registration response message (REG-RSP) applied to the mobile station IP address configuration (establishment) method of the present invention.

FIG. 2 depicts the format of a ranging response message (RNG-RSP) used in the mobile station IP address configuration (establishment) method of the present invention.

FIG. 3 depicts an example of informing whether IP address re-configuration (re-establishment) is needed, via the registration procedures when idle mode is ended because the mobile station in idle mode has downlink (DL) traffic.

FIG. 4 depicts an example of informing whether IP address re-configuration (re-establishment) is needed, via the ranging procedures when idle mode is ended because the mobile station in idle mode has downlink (DL) traffic.

FIG. 5 depicts an example of informing whether IP address re-configuration (re-establishment) is needed, via the ranging procedures when idle mode is ended because the mobile station in idle mode has uplink (UL) traffic.

FIG. 6 depicts an example of informing whether IP address re-configuration (re-establishment) is needed, via the registration procedures when idle mode is ended because the mobile station in idle mode has uplink (UL) traffic.

FIG. 7 depicts a format of a handover check message used in the mobile station IP address configuration (establishment) method of the present invention.

FIG. 8 depicts an example of informing the mobile station through a ranging procedure during handover as to whether its IP address should be re-configured (re-established).

FIG. 9 depicts an example of informing the mobile station through a registration procedure during handover as to whether its IP address should be re-configured (re-established).

FIGS. 10A and 10B depicts an example of how a subnet change can be decided for the DHCP case, wherein the DHCP server exists on the same network with the MSS.

FIGS. 11A and 11B depicts an example of how a subnet change can be decided for the DHCP case, wherein the DHCP server exists on a different network with the MSS.

FIG. 12 shows an example of an agent advertisement message according to the present invention.

DETAILED DESCRIPTION

The preferred exemplary embodiments of the present invention will now be explained. However, those skilled in the art would understand that the features of the present invention should not be limited to only the embodiments described herein.

The present invention is related to the research and development being conducted by various IEEE working groups, such as IEEE 802.16, and thus the concepts and teachings involved therein are applicable to the features of the present invention. Additionally, as various efforts are being made to implement the interworking of different types of networks and communication technologies, such as achieving compatibility between IEEE networks and cellular networks (such as, a third generation (3G) networks), it can be clearly understood that the present invention may also have applicability in achieving such compatibility.

Considering the communication protocols related to wireless (radio) access systems, at the network layer, to allow proper data packet communication via the Internet, an Internet Protocol (IP) provides the necessary addressing and routing information for the packets. Here, each device (e.g., user terminal, mobile handset, wireless connectivity device, etc.) connected via the Internet requires the configuration (establishment) of a unique IP address in order for that device to be properly identified and distinguished from other devices.

The Internet Protocols referred to as IP version 4 (IPv4) and IP version 6 (IPv6) have been developed. By employing 32-bit addresses, IPv4 has been found to have limitations because of the increasing popularity of Internet communications, whereby each device connected with the Internet needs its own unique IP address. As such, because the availability of 32-bit addresses would soon be exhausted, an enhancement was developed, namely, IPv6, which employs 128-bit addresses.

However, the fact that a user terminal may have mobility (e.g., mobile terminals) makes IP address configuration (establishment) more difficult. For example, to support mobility, a user terminal may undergo handover, whereby the terminal being served by one point of attachment (e.g., base station) that covers a certain region, moves to a new location and needs to be served by a different point of attachment (e.g., base station) that covers that new location. In other words, the mobile station that is part of a first subnet (i.e., a portion of the network) moves into a second subnet (i.e., another portion of the network). Another example would be when a user terminal changes its state of operation into a receiving mode from an idle mode, which is an example of a power-saving operation mode that is important because a user terminal having mobility should conserve its limited battery power.

In such handover or idle mode change situations described above, IP address configuration (establishment) must be performed at the appropriate time such that seamless data reception can be received by the user terminal.

In the related art broadband wireless access systems, regarding the handover procedures, a so-called “managed” mobile terminal performs IP address re-establishment (re-configuration) after a secondary management connection identifier (CID) is obtained upon completing handover such that IP communications can be resumed.

When a mobile terminal that moves to a new point of attachment (base station) region is managed mobile terminal, IP address re-establishment is required regardless of the subnet that can be allocated by a foreign agent or by a DHCP server connected with the new point of attachment (base station). Thus, a basis to be used for determining when IP address re-establishment should be performed is needed. In the related art, the determination at the IP layer cannot be known at the MAC layer, and thus the IP address re-establishment cannot be informed to the mobile terminal.

Thus, in the present invention, the point of attachment (base station) uses the IP address related information received via a backbone message (or another type of message), and provides a basis to allow the MAC layer to determine whether the mobile terminal should perform IP address re-establishment related procedures.

As the MAC layer of the point of attachment (base station) can inform the mobile terminal as to whether IP address establishment is necessary, the handover procedures can be simplified and the time delay in resuming communications after handover can be minimized.

One purpose of the present invention is to provide an IP address configuration (establishment) method for a terminal wherein the base station (point of attachment) determines the information related to IP address configuration (establishment) when the terminal changes from idle mode to receiving mode or when handover is performed, and informs this to the terminal.

To achieve this purpose in a broadband wireless access system, in the IP address configuration (establishment) method according to the present invention, the base station (point of attachment) determines and informs the terminal about whether the IP address of the terminal should be re-configured (re-established) when the terminal changes from idle mode to receiving mode or when handover is performed.

Preferably, the base station is a target base station to which the terminal is attempting network entry to.

Preferably, the matter of whether the IP address of the terminal should be re-configured (re-established) is delivered through a ranging response message or a registration response message.

Preferably, the base station respectively compares the IP Subnet, Prefix, and Access Router (NetID) previously used by the terminal with the IP Subnet, Prefix, and Access Router (NetID) that it may use or is currently using, in order to determine whether the IP address of the terminal should be re-configured (re-established).

Preferably, if the network prefix ID (NetID) used by the terminal changes, the base station delivers the changed NetID to the terminal through a ranging response message or a registration response message.

Preferably, the base station delivers whether the IP address should be re-configured (re-established) through a ranging response message or a registration response message only when the network prefix ID (NetID) has changed.

The present invention proposes a scheme in which the IP address establishment (configuration) procedures can be simplified according to changes (NetID) in the IP Subnet, Prefix, Access Router, and Foreign Agent being used, when the mobile/fixed terminal changes from idle mode to receiving mode or when handover is performed.

Namely, the present invention provides a method in which when the terminal receives a paging message from the base station (point of attachment) indicating that data to be transmitted on the downlink currently exists or when data to be transmitted on the uplink exists, the base station determines and informs the terminal as to whether IP address re-establishment (re-configuration) of the terminal is needed, and allowing the IP address re-configuration (re-establishment) procedures to be omitted accordingly. Also, the present invention provides a method in which after the terminal moves during the handover process, the base station determines and informs the terminal as to whether IP address re-configuration (re-establishment) of the terminal is needed, and allowing the IP address re-configuration (re-establishment) procedures to be omitted accordingly.

First, a method of configuring (establishing) an IP address of the terminal that changes from idle mode to receiving mode according to a first embodiment of the present invention will be explained.

In the terminal IP address configuration (establishment) method according to the first embodiment of the present invention, a registration response message (REG-RSP), a ranging response message (RNG-RSP), a paging broadcast backbone message, etc. are defined.

The registration response message (REG-RSP) is a message that is transmitted by setting an IP re-configuration (re-establishment) required bit, when the ID related to the terminal IP address received by the new base station (Target BS) from the previous base station (Serving BS) when the mobile terminal performs registration procedures after handover, and the ID that is currently being used (or can be used) are compared and found to be different.

The ranging response message (RNG-RSP) is a message that is transmitted by setting an IP re-configuration (re-establishment) required bit, when the ID related to the terminal IP address received by the new base station (Target BS) from the previous base station (Serving BS) when the mobile terminal performs ranging with the new base station after handover, and the ID that is currently being used (or can be used) are compared and found to be different.

Accordingly, the new base station (Target BS) informs whether the terminal IP address should be re-configured (re-established) through either the registration response message (REG-RSP) or the ranging response message (RNG-RSP).

The paging broadcast backbone message is a message used when informing the other base stations within the paging zone about the fact that data traffic to be transmitted to the mobile terminal arrived at the base station to which the mobile terminal requested registration release for changing into idle mode, or used when information about the terminals that changed into idle mode is to be commonly shared by the base stations within the same paging zone. Preferably, the paging broadcast backbone message is transmitted by including the network prefix id (NetID) that the mobile terminal had used.

FIGS. 1 and 2 respectively show examples of the formats of the registration response message (REG-RSP) and the ranging response message (RNG-RSP).

As shown in FIG. 1, the registration response message (REG RSP) indicates whether the terminal IP address should be re-configured (re-established) via bit #2. In particular, the registration response message (REG-RSP) can instruct the terminal to change its NetID, if the ID related to IP address of the terminal received by the new base station from the previous base station and the ID being currently used (or that can be used) are compared and found to be different. Preferably, even if bit #2 is not activated, if the NetID change indicator is set, then the terminal re-configures (re-establishes) its IP address.

Also, referring to FIG. 2, the ranging response message (RNG-RSP) indicates whether the terminal IP address should be re-configuration via bit #0, and the NetID change can be instructed to the terminal through a separate bit. Similarly, even if bit #0 is not activated, if the NetID change indicator is set, then the terminal re-configuration of its IP address.

FIG. 3 shows an example of how the matter of whether the IP address re-configuration should be made is informed through the registration procedures when a terminal in idle mode ends its idle mode because downlink (DL) traffic exists.

Referring to FIG. 3, the mobile terminal performs registration release request/response (DREG_REQ/DREG_RSP) with the base station in order to enter idle mode. At this time, the base station broadcasts the information about the terminal that entered idle mode to all base stations within the same paging zone (e.g., through use of a paging-announce message). Through this, the procedures that the terminal must perform should be informed to the base stations at each paging cycle. To do so, the paging broadcast backbone message may be used. The MAC address of the terminal and the Network Prefix ID (NetID) corresponding to the IP address used by the mobile terminal are both included in the paging broadcast backbone message and transmitted.

Thereafter, for a mobile terminal in idle mode, when data traffic (uplink traffic) that needs to be transmitted is generated or when data traffic (downlink traffic) that needs to be received is generated, the mobile terminal ends its idle mode and performs network entry.

The base station (BS#3), with which the mobile station performs network entry procedures, compares the network prefix ID (NetID) received from the base station (BS#1) that had its registration released by the mobile terminal and the network prefix ID (NetID) that it currently can use, and then the matter of whether IP address re-configuration (re-establishment) would be needed or not is informed to the mobile terminal during the ranging procedures (via a RNG-RSP message) or during the registration procedures (via a REG-RSP message).

Accordingly, the mobile terminal determines whether to re-configure (re-establish) its IP address based upon the RNG-RSP or REG-RSP message, and if not required, the IP address re-configuration (re-establishment) procedures may be omitted, which allows communications to be resumed more quickly.

Also, when an ID related to an IP address is changed for handover with another type of network, this can be informed by the base station to the mobile station by including such in a ranging or registration response message.

Thus, the methods that can be performed by the base station to inform the mobile station about whether IP address re-configuration (re-establishment) would be needed can be summarized as follows.

1. Method of informing by setting a configuration bit in the registration response message.

2. Method of informing by setting a configuration bit in the ranging response message.

For 1 or 2 above, if the network prefix ID (NetID) changes, this changed ID must be informed to the terminal separately by using the ranging response message and the registration response message.

3. Only in the case where the network prefix ID (NetID) changes, the mobile terminal is informed through the ranging response message or the registration response message.

FIG. 4 shows an example of informing whether or not the IP address re-configuration (re-establishment) is needed through a ranging procedure when the terminal ends its idle mode because downlink traffic exists.

FIG. 5 also shows an example of informing whether or not the IP address re-configuration (re-establishment) is needed through a ranging procedure when the terminal ends its idle mode because downlink traffic exists.

FIG. 6 shows an example of informing whether or not the IP address re-configuration (re-establishment) is needed through a registration procedure when the terminal ends its idle mode because uplink traffic exists.

Hereafter, a method of configuring (establishing) an IP address of the terminal during handover according to a second embodiment of the present invention will be explained.

In the terminal IP address configuration (establishment) method according to the second embodiment of the present invention, a registration response message (REG-RSP), a ranging response message (RNG-RSP), a handover confirmation message (HO-confirm), etc. are defined.

The registration response message (REG-RSP) is a message that is transmitted by setting an IP re-configuration (re-establishment) required bit, when the ID related to the terminal IP address received by the new base station (Target BS) from the previous base station (Serving BS) when the mobile terminal performs registration procedures after handover, and the ID that is currently being used (or can be used) are compared and found to be different.

The ranging response message (RNG-RSP) is a message that is transmitted by setting an IP re-configuration (re-establishment) required bit, when the ID related to the terminal IP address received by the new base station (Target BS) from the previous base station (Serving BS) when the mobile terminal performs ranging with the new base station after handover, and the ID that is currently being used (or can be used) are compared and found to be different.

Also, the handover confirmation message is a message that allows delivery through the backbone of an IP address related message of the mobile terminal that will move from a previous base station to a new base station when the mobile terminal performs handover. Accordingly, the new base station (Target BS) can determine whether the IP address of the mobile terminal should be re-configured (re-established) through the above-described messages.

The formats of the registration response message (REG-RSP) and the ranging response message (RNG-RSP) are shown in FIGS. 1 and 2, respectively, while the format of the handover confirmation message is shown in FIG. 7.

In general, there are two types of handover; a handover started by the mobile terminal and a handover determined by the network. In either case, when handover is performed, a handover confirmation message (HO-confirm) is delivered over the backbone from the previous base station (Serving BS) to a new base station (Target BS). When the handover confirmation message (HO-confirm) having the IP address of the terminal that is moving and its related ID (NetID=xxx) is delivered, the new base station uses this for comparison with the IP address related ID (NetID) that is uses and can inform the comparison result to the terminal after handover is completed when the ranging or registration procedure is performed.

Thus, based upon the above results, the terminal can know whether the IP address should be re-configured (re-established) or whether the previously used IP address can be used. By employing the method of the present invention, the need for the terminal to re-configure (re-establish) its IP address during handover can be reduced for situations such as when the previous base station and the new base station have the same IP subnet, when the foreign agent (FA) is the same, etc., to thus minimize the delays caused each time the IP address is configured (established).

Accordingly, in the terminal IP address configuration method according to the second embodiment of the present invention, there are three methods by which the base station can inform the mobile terminal about whether the IP address should be re-configured (re-established), which are the same as those of the first embodiment.

FIG. 8 shows an example of the operation in informing the terminal about whether the IP address should be re-configured (re-established) through the ranging procedures during handover.

FIG. 9 shows an example of the operation in informing the terminal about whether the IP address should be re-configured (re-established) through the registration procedures during handover.

It can be said that the present invention relates to the minimization of IP connectivity establishment procedures. IEEE 802.16 uses DHCP (Dynamic Host Configuration Protocol) and Mobile IP in order to allocate IP addresses to MSSs (Mobile Subscriber Stations), and after the MSS handover to the target BS (base station), re-establishment of IP connectivity is required. However, in case the same subnet is used in the target BS or the same Foreign Agent is connected in the new BS, the re-establishment of IP connectivity procedure can be skipped and the MSS can use the same IP address. Therefore, a mechanism to determine the subnet change or Foreign Agent change for a moving MSS is required. When the MSS moves to a new BS, to decide the MSS's subnet change or Foreign Agent change, the new BS can provide the MSS with an instruction of subnet change provided through a backbone message. Here, the network ID can represent a Subnet Prefix, an Access Router, or a Foreign Agent. One BS can have more than one NetID depending upon the network configuration.

The current IEEE 802.16 does not provide the MSS with an instruction for IP re-establishment. However, the present inventors propose a possible solution for the MSS to make a decision as to whether it needs to re-establish IP connectivity. By giving the MSS's IP related information to the target BS over a backbone, the target BS can provide a moving MSS with an instruction of IP-establishment.

In the related art, after MSS handover, a new IP allocation procedure is required regardless of subnet change. However, if the network subnet is not changed in the new BS, the MSS can use the old IP address which was used in the previous BS. Namely, in the DHCP case, if the network subnet is not changed in the new BS, the MSS can use the old IP address which was used in the previous BS. In the Mobile IPv4 case, when a MSS moves to a new BS, it takes some time for the MSS to re-establish IP connectivity using Mobile IPv4. However, if the same Foreign Agent is connected to the new BS, the MSS can skip the mobile IP procedure to reduce delay.

To do so, the MSS needs information to decide whether the subnet or Foreign Agent is different from the previous BS. The information for subnet change decision is different depending upon the method for allocation the IP address. Two IP address allocating methods can be defined. One is using DHCP, and the other is using Mobile IPv4. Since DHCP messages and Mobile IPv4 messages are flowing on the secondary management connection, the BSs can monitor and store the IP related information. When an MSS is moving to a new BS, the old BS sends stored information (e.g., send MSS's NetID through a backbone) to the new BS, which then compares the received information with its own stored information (e.g., NetID) to make a decision of subnet change. The new BS provides a decision of subnet change in REG-RSP to the MSS after MSS's successful handover. For example, if one of the NetIDs in the new BS is the same as the received NetID from the previous BS, the new BS instructs the MSS with IP re-establishment is not required in a “Method for allocating IP address TLV of REG-RSP. If the NetID either in the Serving BS or the Target BS or both do not exist, the target BS should instruct to the MSS to re-establish IP connectivity.

The procedures of how a subnet change can be decided for the DHCP case and for the Mobile IP case will be described hereafter.

FIGS. 10A, 10B, 11A and 11B show examples of the DHCP case, whereby, FIGS. 10A and 10B show when the DHCP server exists on the same network with the MSS, while FIGS. 11A and 11B shown when the DCHP server exists on a different network with the MSS. FIG. 10A shows a DHCP message broadcast by the MSS, and FIG. 10B shows a DHCP message sent by the DHCP server in response to the message from the MSS. FIG. 11A shows a DHCP message forwarded from a MSS to a DHCP server by a relay agent in the router, while FIG. 11B shows a response from the DHCP server forwarded by the relay agent in the router to the MSS.

Referring to FIGS. 10A through 11B, the relay agent IP address and server identifier in the DHCP response from the server can be used to decide whether a subnet is changed. Here, ‘giaddr’ refers to a relay agent IP address, and ‘server identifier’ is used to identify a DHCP server in a DHCP message and as a destination address from clients to servers.

In the Mobile IPv4 case, the MSSs determine their movement by either using a lifetime field within the ICMP Router Advertisement [IETF RFC 1256] portion of an Agent Advertisement [IETF RFC 3220] or by using Network-Prefixes [IETF RFC 3220]. The Router Address with prefix-length extension can identify a network-prefix. However, the prefix-length is an optional parameter, and when the prefix-length is not present, this information should not be used to decide the network-prefixes. FIG. 12 shows an example of an agent advertisement message.

In the DHCP case, the BS listens to the DHCP offer message from the DHCP server to the MSSs on the secondary management connection and stored the ‘giaddr’ and ‘server identifier’. In the Mobile IP case, the BS listens to the periodic Agent Advertisement from the Foreign Agent and stores the Router Address in an ICMP Router Advertisement portion and a prefix-length extension in the Prefix-Length Extension of an Agent Advertisement.

By providing information to a target BS when MSS moves to a new BS, the target BS can determine whether the MSS's subnet has changed or not. The target BS tells the MSS whether it has to re-establish IP connectivity or not in the registration response (RSG-RSP) message.

Accordingly, the present invention adds a mechanism for the BS to monitor the DHCP related and Mobile IP related information. Also, Type-Length-Value (TLV) parameters are added into the REG-RSP message, which is used to instruct the MSS whether it should perform an IP address re-establishment procedure.

For mobile networks, the target BS may include the IP Address Change Information TLV in the REG-RSP message for MSS handover. The TLV specifies whether MSS has to re-establish IP connectivity or not based on the received information from the old BS over a backbone. If the target BS cannot make a decision, the value should be set to 1.

For a managed MSS, there is the possibility that entry at the new BS necessitates Layer 3 protocol exchanges in order to retain IP connectivity. Such an MSS should take appropriate steps to detect and respond to the change of BS (e.g., by performing Mobile IPv4 movement detection and re-registration, or Mobile IPv4 Binding Update). In order for the MSS to facilitate an IP connectivity retainment, the new BS may provide the MSS with an instruction of IP address change. The new BS's IP address change instruction is made based on the information from the old BS over a backbone. This information is stored by monitoring the MSS's IP connectivity establishment using DHCP and listening to an Agent Advertisement from the Foreign Agent on the secondary management connection.

The following Table 1 shows an example of IP address establishment information.

TABLE 1
Name Type Length Value Scope
IP Address Establishment ?? variable Compound REG-RSP
Information

The following Table 2 shows an example of TLV values that may appear in the IP address establishment information TLV.

TABLE 2
Name Type Length Value Scope
DHCP IP ??.? 8 Relay agent's IP REG-RSP
address address in giaddr
establishment and the DHCP server IP
information address in the server
identifier option in
DHCP message

The following Table 3 shows an example of TLV values that may appear in the IP address establishment information TLV.

TABLE 3
Name Type Length Value Scope
Mobile IP FA ??.? variable Router Addresses in REG-RSP
address ICMP Router
information Advertisement portion
and prefix-length
extension in Prefix-
Length Extension of an
Agent Advertisement

The following Table 4 shows an example of an IP Address Change Information. This field indicates whether or not the MSS needs to re-establish an IP address after handover. A bit value of ‘O’ indicates that such is not required, while ‘1’ indicates it is required.

TABLE 4
Name Type Length Value Scope
IP Address ?? 1 Bit #0: IP re- REG-RSP
Change establishment required

The following Table 5 shows an example of the format of a Handover Confirm Message.

TABLE 5
Field Size Notes
Global Header 152 bits
For (j=0; j<Num Records;
j++) {
MSS unique identifier 48 bits A unique identifier used
by MSS (as provided to
the BS on the RNG-REQ
message)
BW Estimated 8 bits Bandwidth which is
provided by BS (to
guarantee minimum
packet data trans-
mission) TBD how to
set this field
QoS Estimated 8 bits Quality of Service level
Unsolicited Grant Service
(UGS)
Real-time Polling Service
(rtPS)
Non-real-time Polling
Service (nrtPS)
Best Effort Service (BE)
}
Relay Agent IP address 32 bits Relay Agent's IP address
in giaddr in DHCP message
DHCP server IP address 32 bits DHCP server IP address
in the server identifier
option in DHCP message
from the server
For (k=0; k<Num Router
Addr;
k++) {
Router Address 32 bits Router Addresses in ICMP
Router Advertisement
portion
Prefix-Length 8 bits Prefix-length extension
in Prefix-Length-Extension
of an Agent Advertisement
}
Security field TBD A means to authenticate
this message

Also, the present invention proposes to modify the “method for allocating IP address TLV” in the REG-RSP messages, which are used to instruct the MSS as to whether it should perform IP address re-establishment procedures, which is achieved by adding “NetID” and “HO-Confirm and Paging-announce” backbone messages.

Regarding the “Method for allocating IP address,” for establishing IP connectivity, the BS may include the method for allocating IP address TLV in the REG-RSP for the SS's or MSS's IP connectivity establishment. The TLV also specifies whether the MSS has to re-establish IP connectivity or not when the MSS moves to the new BS. The IP re-establishment required bit is set based on the comparison with the received NetID from the old BS over a backbone. If the target BS cannot make a decision, the value should be set as ‘1’ (IP re-establishment required).

The following Tables 6 and 7 show examples of the Method for allocating IP address, Table 8 shows an example of a HO-Confirm Message format, and Table 9 shows an example of a Paging-announce message.

TABLE 6
Type Length Value Scope
5.23 1 Bit #0: DHCP - default REG-REQ
Bit #1: Mobile IPv4 REG-RSP
Bit #2: IP re-establishment required
Bit #3–7: reserved; shall be set
to zero

TABLE 7
Type Length Value
17 1 Bit #0: DHCP
Bit #1: Mobile IPv4
Bit #2: IP re-establishment required
Bit #3–7: reserved; shall be set to zero

TABLE 8
Field Size Notes
Global Header 152 bits
For (j=0; j<Num Records;
j++) {
MSS unique identifier 48 bits A unique identifier
used by MSS (as
provided to the BS
on the RNG-REQ
message)
BW Estimated 8 bits Bandwidth which is
provided by BS (to
guarantee minimum
packet data trans-
mission) TBD how to
set this field
QoS Estimated 8 bits Quality of Service level
Unsolicited Grant Service
(UGS)
Real-time Polling Service
(rtPS)
Non-real-time Polling
Service (nrtPS)
Best Effort Service (BE)
}
NetID 8 bits Network ID of MSS
Security field TBD A means to authenticate
this message

TABLE 9
Field Size Notes
Message Type=? 8 bits
Sender BS-ID 48 bits A BS unique identifier
used by MSS (same number
as that broadcast on
the DL-MAP message)
Target BS-ID 48 bits Set to 0xffffff to
indicate broadcast
Time Stamp 32 bits Number of milliseconds
since midnight GMT (set
to 0xffffff to ignore)
Num MSS 8 bits Number of MSSs to page
For (j=0; j<Num Records;
j++)
{
MSS MAC address 48 bits 48-bit unique identifier
used by MSS (as provided
to the BS on the RNG-REQ
message)
NetID 8 bits Network ID of MSS
PAGING CYCLE 16 bits Bandwidth which is
provided by BS (to
guarantee minimum
packet data trans-
mission) TBD how to
set this field
PAGING OFFSET 8 bits Quality of Service level
Unsolicited Grant Service
(UGS)
Real-time Polling Service
(rtPS)
Non-real-time Polling
Service (nrtPS)
Best Effort Service (BE)
}
Security field TBD A means to authenticate
this message
CRC field 32 bits

Regarding the effects of the present invention, when a mobile terminal in idle mode performs network entry procedures, the bases station (point of attachment) that performed the registration release procedures of the mobile terminal delivers the network prefix related information (e.g., NetID, Router Advertisement, Agent Advertisement) of the mobile terminal to another base station (point of attachment) within the same paging zone, and the base station performing the network entry compares the above network prefix related information (e.g., NetID) with the network prefix related information (e.g., NetID) that it is using, to inform whether IP address re-configuration (re-establishment) of the mobile station would be needed. Thus, by using the present invention, when the network prefix related information (e.g., NetID) of a terminal is changed, this changed network prefix related information (e.g., NetID) is informed to the terminal to allow it to be used when performing handover with a different network other that a IEEE 802.16 network.

Also, in the present invention, when the mobile terminal performs IP address configuration (establishment) procedures after handover, if the subnet used among two base stations are the same or if the same foreign agent is used, the previous base station delivers the network prefix related information (e.g., NetID, router advertisement, Agent Advertisement) to the new base station, the new base station compares the delivered network prefix related information (e.g., NetID) with the network prefix related information (e.g., NetID) that it can or is currently using, and informs the mobile station as to whether IP address re-configuration is needed or not.

Accordingly, the present invention has the effect of simplifying the IP address configuration (establishment) procedures when the terminal changes from idle mode to receiving mode or when handover is performed, and can thus minimize the time delay caused by IP address re-configuration (re-establishment) of the related art.

As the present invention has been described above with respect to wireless access technologies, it can be clearly understood that various types of wireless access technologies currently under development (such as WiMax, WiBro, Wi-Fi, etc.) can also benefit from the features and teachings of the present invention, which are applicable because of the similarities involved in wireless communications involving user terminal mobility, handovers and idle mode operations.

The foregoing description of the preferred embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments. Thus, the present invention is not intended to be limited to the embodiments shown herein but us to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (3)

1. A method of configuring an Internet Protocol (IP) address of a terminal in a broadband wireless access system, the method comprising:
receiving a network prefix ID through a paging broadcast backbone message from a previous base station from which a registration of the mobile station is released;
receiving a registration request message from the terminal;
comparing a currently usable network prefix ID with the network prefix ID received from the previous base station;
determining whether an IP address of the terminal should be re-configured; and
transmitting a registration response message informing the terminal about whether the IP address of the terminal should be re-configured according to the determination,
wherein a result of the determination of whether the IP address should be re-configured is informed by activation of an IP re-establishment required bit or a network prefix ID change indicator of the registration response message both when the IP address should be re-configured and when the EP address should be not re-configured,
wherein the registration response message comprises IP address allocation information and network ID information, the IP address allocation information including values indicating Dynamic Host Configuration Protocol (DHCP)-default, mobile IPv4, and IP re-establishment required,
wherein the value indicating DHCP-default corresponds to bit #0 of the IP address allocation information, the value indicating mobile IPv4 corresponds to bit #1 of the IP address allocation information, and the value indicating IP re-establishment required corresponds to bit #2 of the IP address allocation information,
wherein bits #3 to #7 of the IP address allocation information are set to zero, and
wherein the paging broadcast backbone message is a message used to share information about mobile terminals among base stations within a same paging zone.
2. A method of establishing Internet Protocol (IP) connectivity for a user device, the method performed by the user device and comprising:
performing a deregistration procedure with a network in order to enter an idle mode;
ending the idle mode and performing network entry procedures with the network upon detection of a need for sending uplink traffic or for receiving downlink traffic;
receiving instructions from the network that specify whether an IP address of the user device should be re-configured, the instructions indicated by activation of an IP re-establishment required bit or a network prefix ID change indicator of a registration response message both when the IP address should be re-configured and when the IP address should be not re-configured; and
establishing IP connectivity with the network using the IP address that is re-configured according to the received instructions,
wherein the instructions are included in the registration response message received from the network during the network entry procedures,
wherein the network compares a currently usable network prefix ID with a network prefix ID established prior to the deregistration procedure, determines whether the IP address should be re-configured, and sends the instructions based on the determination,
wherein the registration response message comprises IP address allocation information and network ID information, the IP address allocation information including values indicating Dynamic Host Configuration Protocol (DHCP)-default, mobile IPv4, and IP re-establishment required,
wherein the value indicating DHCP-default corresponds to bit #0 of the IP address allocation information, the value indicating mobile IPv4 corresponds to bit #1 of the IP address allocation information, and the value indicating IP re-establishment required corresponds to bit #2 of the IP address allocation information, and
wherein bits #3 to #7 of the IP address allocation information are set to zero.
3. A method of establishing internet Protocol (IP) connectivity for a user device, the method performed by the user device and comprising:
receiving a handover request from a serving base station of a network, the serving base station having performed handover pre-notification procedures with a target base station;
performing a neighbor scanning procedure with the network;
sending a handover response to the serving base station;
receiving a handover indication from the serving base station that performed handover confirmation with the target base station;
performing a ranging procedure and a registration procedure with the target base station;
receiving instructions from the target base station that specify whether an IP address of the user device should be re-configured, the instructions indicated by activation of an IP re-establishment required bit or a network prefix ID change indicator of a registration response message both when the IP address should be re-used and when the IP address should be re-configured; and
establishing IP connectivity with the network using the IP address that is re-configured according to the received instructions,
wherein the target base station receives a network prefix ID from the serving base station through a paging broadcast backbone message, compares a currently usable network prefix ID with the network prefix ID received from the previous base station, determines whether the IP address should be re-configured, and sends the instructions based on the determination,
wherein the registration response message comprises IP address allocation information and network ID information, the IP address allocation information including values indicating Dynamic Host Configuration Protocol (DHCP)-default, mobile IPv4, and IP re-establishment required,
wherein the value indicating DHCP-default corresponds to bit #0 of the IP address allocation information, the value indicating mobile IPv4 corresponds to bit #1 of the IP address allocation information, and the value indicating IP re-establishment required corresponds to bit #2 of the IP address allocation information,
wherein bits #3 to #7 of the IP address allocation information are set to zero, and
wherein the paging broadcast backbone message is a message used to share information about mobile terminals among base stations within a same paging zone.
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090104910A1 (en) * 2007-10-17 2009-04-23 Samsung Electronics Co. Ltd. Apparatus and method for processing handover in a wireless communication system
US20100183014A1 (en) * 2009-01-22 2010-07-22 Check Point Software Technologies, Ltd. Methods and devices for packet tagging using ip indexing via dynamic-length prefix code
US20100195598A1 (en) * 2007-09-18 2010-08-05 Wei Wang accounting method for ultra mobile broadband access network
US8266257B1 (en) * 2009-09-01 2012-09-11 Symantec Corporation Systems and methods for reducing the amount of time required to reconnect to a computing network
US20160135069A1 (en) * 2013-07-12 2016-05-12 Lg Electronics Inc. Method and apparatus for transmitting indication of cell coverage in wireless communication system
US20170048725A1 (en) * 2015-08-12 2017-02-16 Samsung Electronics Co., Ltd Method and apparatus for self-configuration and self-optimization in a wireless communication system

Families Citing this family (55)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1965504B (en) * 2004-06-07 2012-03-21 三星电子株式会社 System for handover in bwa communication system and method thereof
US7917183B2 (en) * 2004-06-25 2011-03-29 Lg Electronics Inc. Method of controlling idle mode in broadband wireless access system
KR20060012242A (en) * 2004-08-02 2006-02-07 엘지전자 주식회사 Method for association between base-station and mobile terminal in broadband wireless access system
KR100885158B1 (en) * 2004-08-09 2009-02-23 엘지전자 주식회사 Periodic ranging method for sleep mode terminal in broadband wireless access system
KR100876771B1 (en) * 2004-08-17 2009-01-07 삼성전자주식회사 Method for compressing of control information, method for transceiving of scanning information of radio communication system and thereof apparatus
KR100670423B1 (en) * 2004-11-04 2007-01-16 삼성전자주식회사 System and method for communication using heterogeneous neighbor base station information in a broadband wireless access communication system
KR100708119B1 (en) * 2005-01-08 2007-04-16 삼성전자주식회사 Method and apparatus for providing and obtaining a information about local agent at wireless network
KR100617733B1 (en) * 2005-01-22 2006-08-28 삼성전자주식회사 System and method for network re-entry in a communication system
KR101119101B1 (en) * 2005-02-16 2012-03-19 엘지전자 주식회사 Method for Allocating IP Address in Broadband Wireless Access System
WO2006110016A3 (en) * 2005-04-14 2007-12-27 Yong Ho Kim A method of reconfiguring an internet protocol address in handover between heterogeneous networks
US20060274743A1 (en) * 2005-06-06 2006-12-07 Alper Yegin System and method for a mobile device to learn information about the access networks within its neighborhood
WO2007004208A1 (en) * 2005-07-03 2007-01-11 Alvarion Ltd. Transfer of secure communication sessions between wireless networks access points
KR100703416B1 (en) * 2005-07-06 2007-04-03 삼성전자주식회사 System and method for notifying completion of a network re-entry procedure in a communication system
US7747252B2 (en) * 2005-07-12 2010-06-29 Futurewei Technologies, Inc. Method and system for handover negotiation optimization for wireless system
US9184898B2 (en) * 2005-08-01 2015-11-10 Google Technology Holdings LLC Channel quality indicator for time, frequency and spatial channel in terrestrial radio access network
KR100957355B1 (en) * 2005-08-25 2010-05-12 삼성전자주식회사 System and method for fast paging in a wireless mobile communication system based on internet protocol
US7640445B2 (en) * 2005-08-26 2009-12-29 Canon Kabushiki Kaisha Power-saving control method for a network device
KR100735265B1 (en) * 2005-09-14 2007-07-03 삼성전자주식회사 Method and system for configurating ip address in a mobile communication system
KR100901373B1 (en) * 2005-10-11 2009-06-05 삼성전자주식회사 Apparatus and method for managing connection identifier in a multi-hop relay wireless access communication system
KR100703802B1 (en) * 2005-10-20 2007-03-29 삼성전자주식회사 Method and apparatus for handover on wireless network
US7933236B2 (en) * 2005-10-27 2011-04-26 Nortel Networks Limited Methods and systems for a wireless routing architecture and protocol
US9204420B2 (en) * 2006-01-25 2015-12-01 Alcatel Lucent QoS-aware paging in a wireless communication system
KR100872421B1 (en) * 2006-03-06 2008-12-05 삼성전자주식회사 Apparatus and supporting optimized network reentry procedure in a multi-hop relay broadband wireless access communication system
EP1833274A1 (en) * 2006-03-08 2007-09-12 Matsushita Electric Industrial Co., Ltd. Method and system for fast handovers using dynamic router advertisements
KR20070097858A (en) * 2006-03-29 2007-10-05 주식회사 팬택앤큐리텔 Packet switched radio telecommunication system supporting lossless hard hand over and method for hard hand over
US20070264979A1 (en) * 2006-04-25 2007-11-15 Sk Telecom Co., Ltd. Method and system for registering IP address in portable Internet network when interworking with different types of network
CN101064959B (en) 2006-04-30 2014-02-26 华为技术有限公司 Method for network side to initiate mobile terminal to enter into the idle mode in wireless city area network
WO2007133034A3 (en) * 2006-05-13 2009-05-28 Lg Electronics Inc Method of performing procedures for initial network entry and handover in a broadband wireless access system
US8149843B2 (en) * 2006-06-28 2012-04-03 Cisco Technology, Inc. Capability exchange between network entities in WiMAX
KR20080008935A (en) 2006-07-18 2008-01-24 엘지전자 주식회사 Method for pre-configuration of ip address in the mobile communication system
US20080025250A1 (en) * 2006-07-28 2008-01-31 Motorola, Inc. Method and system for setting paging indication sequences in paging messages
JP4848890B2 (en) * 2006-08-23 2011-12-28 日本電気株式会社 Mobile communication system and its method as well as a base station used for the same
EP1912400A1 (en) * 2006-10-10 2008-04-16 Matsushita Electric Industrial Co., Ltd. Method and apparatus for mobile IP route optimization
KR101012007B1 (en) * 2006-10-31 2011-01-31 삼성전자주식회사 Method and apparatus for scanning signal of neighboring base station in broadband wireless communication system
US7953830B2 (en) * 2006-11-07 2011-05-31 International Business Machines Corporation Automatic network reconfiguration upon changes in DHCP IP addresses
WO2008076626A1 (en) * 2006-12-14 2008-06-26 Adaptix, Inc. Systems and methods for allowing ip address handoff for mobile devices
CN101202768A (en) * 2006-12-14 2008-06-18 昂达博思公司 System and method for allowing skip zone switch of mobile equipment IP address
KR101370824B1 (en) * 2007-05-16 2014-03-07 삼성전자주식회사 Method and apparatus of performing handover for mobile node to reduce latency for setting address
US20080299973A1 (en) * 2007-05-29 2008-12-04 Motorola, Inc. Method and apparatus for supporting a controlled handover in a wireless network
EP2156680A2 (en) * 2007-06-19 2010-02-24 Nokia Corporation Apparatus, method and computer program product providing idle mode discontinuous reception
CN101330644B (en) * 2007-07-16 2011-05-25 中兴通讯股份有限公司 Method for controlling beep-page permission of multi-business flow of a mobile grouping field
KR101055109B1 (en) * 2007-07-25 2011-08-08 엘지전자 주식회사 To support sessions and session continuity, the way to go
US20100316035A1 (en) * 2008-02-12 2010-12-16 Panasonic Corporation Position information management device, network edge device, and mobile terminal
US8200285B2 (en) * 2008-04-30 2012-06-12 Nokia Siemens Network Oy Initial eNode-B configuration over-the-air
JP5158194B2 (en) * 2008-05-02 2013-03-06 富士通株式会社 Base station, the mobile device and method
US8880705B2 (en) 2008-10-15 2014-11-04 Qualcomm Incorporated Systems and methods for dynamic creation and release of proxy mobile IP connections
US20100136972A1 (en) * 2008-12-01 2010-06-03 Institute For Information Industry Gateway module, communication method, and computer program product thereof
US9155067B2 (en) * 2009-06-30 2015-10-06 France Telecom Method for activating a communication terminal
KR101673592B1 (en) * 2009-12-10 2016-11-07 삼성전자주식회사 Method and sytem for dynamic host configuration protocol information renual at handover between asn gw in a mobile communication sytem
US20110216738A1 (en) * 2010-03-05 2011-09-08 Futurewei Technologies, Inc. Method and System for Mobile Station Acquisition
EP2421321B1 (en) * 2010-08-16 2017-12-27 BlackBerry Limited Methods and mobile station for reestablishing a connection by way of NAS procedures
US20130044731A1 (en) * 2011-08-15 2013-02-21 Qualcomm Incorporated Proactive Feedback Transmissions During Handover Procedures
US9693266B2 (en) 2013-07-15 2017-06-27 Qualcomm Incorporated System and method to assign an internet protocol address to a mobile device during a handoff
CN105450541A (en) * 2014-08-29 2016-03-30 阿尔卡特朗讯 Method and apparatus for routing application packet based on service link
US9949063B2 (en) 2015-06-01 2018-04-17 Apple Inc. Bluetooth low energy triggering NAN for further discovery and connection

Citations (52)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0758771A (en) 1993-08-12 1995-03-03 Sharp Corp Address managing device
JPH09331580A (en) 1996-06-13 1997-12-22 Toshiba Corp Radio communication system provided with message transmission service function
JPH11103320A (en) 1997-08-01 1999-04-13 Toshiba Corp Mobile computer system, mobile computer managing device, mobile information managing device and communication control method
KR20000056076A (en) 1999-02-12 2000-09-15 서평원 Packet Data Service Providing System in Mobile Communication System and Operating Method using the same of
WO2000060811A1 (en) 1999-04-07 2000-10-12 Telefonaktiebolaget Lm Ericsson (Publ) Mobile terminal sleep phase assignment and announcement in a wireless local area network
US6144653A (en) 1993-11-01 2000-11-07 Telefonakteibolaget Lm Ericsson Method for communicating in a wireless communication system
US20010024443A1 (en) 1999-12-20 2001-09-27 Fredrik Alriksson Mobile IP for mobile Ad Hoc networks
CA2395638A1 (en) 2000-10-26 2002-05-02 Samsung Electronics Co., Ltd. Handover method for mobile station having mobile ip address in mobile communication system
US6385451B1 (en) 1998-09-14 2002-05-07 Nokia Mobile Phones Limited Handover between mobile communication networks
US20020062388A1 (en) 2000-09-12 2002-05-23 Ogier Richard G. System and method for disseminating topology and link-state information to routing nodes in a mobile ad hoc network
CA2397966A1 (en) 2000-11-21 2002-05-30 Samsung Electronics Co., Ltd. Regional tunnel management method in a mobile communication system using mobile ip
JP2002186010A (en) 2000-12-13 2002-06-28 Mitsubishi Electric Corp Mobile node position management method and network system
US20020098840A1 (en) 1998-10-09 2002-07-25 Hanson Aaron D. Method and apparatus for providing mobile and other intermittent connectivity in a computing environment
US20020114293A1 (en) 2001-02-16 2002-08-22 Lila Madour Mobile IP mobility management at dormant hand-over in cdma ip based cellular packet-data network
US20020118656A1 (en) 2001-02-27 2002-08-29 Prathima Agrawal Dynamic forward assignment of internet protocol addresses in wireless networks
US20020141361A1 (en) 2001-04-03 2002-10-03 Lila Madour Mobile IP registration in selected inter-PDSN dormant hand-off cases in a CDMA2000-based cellular telecommunications network
JP2002344479A (en) 2001-05-16 2002-11-29 Kddi Corp Data transfer method of mobile ip
CN1413034A (en) 2001-10-17 2003-04-23 阿尔卡塔尔公司 Network calling system and method
US20030076808A1 (en) * 1998-09-17 2003-04-24 Mcniff Peter Gerald System and method for mobile computing device registration with a service node
CN1424859A (en) 2001-12-10 2003-06-18 株式会社Ntt都科摩 Mobile communication system, method, mobile terminals and base stations
US6590880B1 (en) 1999-10-15 2003-07-08 Nokia Corporation Apparatus, and associated method, for facilitating communication handover in packet radio communication system
US20030142642A1 (en) 2002-01-31 2003-07-31 Prathima Agrawal Dynamic assignment and validation of IP addresses in wireless IP networks
JP2003274438A (en) 2002-03-18 2003-09-26 Victor Co Of Japan Ltd Wireless terminal, line controller, and ip wireless phone system
US20030185236A1 (en) 2002-03-27 2003-10-02 Hitachi, Ltd. Method and apparatus for translating protocol
US6665713B1 (en) * 1999-06-08 2003-12-16 Nec Corporation Topology information automatic configuration method and its topology information automatic configuration system
US20040002333A1 (en) 2002-06-26 2004-01-01 Neufeld Arthur J. Fast reacquisition after long sleep
US20040013111A1 (en) * 2002-07-16 2004-01-22 Stefano Faccin Apparatus, and associated method, for providing router advertisment information to a mobile node in a radio IP system
US6704789B1 (en) 1999-05-03 2004-03-09 Nokia Corporation SIM based authentication mechanism for DHCPv4/v6 messages
WO2004021728A2 (en) 2002-08-30 2004-03-11 Nokia Corporation Mobile unit attachment/update to cellular communication network
US20040068571A1 (en) * 2001-02-06 2004-04-08 Kalle Ahmavaara Access system for an access network
JP2004112148A (en) 2002-09-17 2004-04-08 Toshiba Corp Mobile communication terminal
JP2004120171A (en) 2002-09-25 2004-04-15 Sony Corp Radio communication system, radio communication method, radio communication unit, radio terminal
US20040082312A1 (en) * 2001-02-19 2004-04-29 O'neill Alan W Communications network
US20040085957A1 (en) 2002-11-01 2004-05-06 Sanjeev Verma Apparatus and method for providing IP connectivity to mobile nodes during handover
US6735202B1 (en) 1998-11-13 2004-05-11 Lucent Technologies Inc. Mobility management techniques for use in an internet protocol-based multimedia mobile network
US20040122976A1 (en) * 2002-10-24 2004-06-24 Ashutosh Dutta Integrated mobility management
US20040157607A1 (en) * 2002-09-10 2004-08-12 Soo-Hwan Kim Method and system for employing common data location register shared between public and private networks in high-speed wireless data system
US20040179532A1 (en) 2003-03-10 2004-09-16 Pascal Thubert Arrangement for traversing an IPv4 network by IPv6 mobile routers
US20040203765A1 (en) * 2002-06-27 2004-10-14 Kaustubh Das Continuous mobility across wireless networks by integrating mobile IP and GPRS mobility agents
US20040218556A1 (en) 2003-04-30 2004-11-04 Samsung Electronics Co., Ltd. System and method for controlling state transition in sleep mode and awake mode in a broadband wireless access communication system
US20040235536A1 (en) 2003-04-29 2004-11-25 Samsung Electronics Co., Ltd. Method for setting sleep interval in a broadband wireless access communication system
US20040266436A1 (en) * 2003-06-27 2004-12-30 Nokia Corporation Handover
US20050027834A1 (en) 2003-07-29 2005-02-03 Sbc Knowledge Ventures, L.P. Bi-level addressing for internet protocol broadband access
US20050025164A1 (en) * 2003-07-16 2005-02-03 Telefonaktiebolaget L M Ericsson (Publ) Seamless hand-off of mobile node to a wireless local area network (WLAN)
US20050130660A1 (en) 2003-12-02 2005-06-16 Samsung Electronics Co., Ltd. Inter-technology handoff method in an IP-based wireless communication system
US20050165953A1 (en) 2004-01-22 2005-07-28 Yoshihiro Oba Serving network selection and multihoming using IP access network
US20050213539A1 (en) 2004-03-29 2005-09-29 Ashutosh Dutta Fast handoff using GPS technology for mobile telematics
US6982967B1 (en) 2000-06-29 2006-01-03 Cisco Technology, Inc. Methods and apparatus for implementing a proxy mobile node in a wireless local area network
US7006472B1 (en) 1998-08-28 2006-02-28 Nokia Corporation Method and system for supporting the quality of service in wireless networks
US7213057B2 (en) * 2004-03-31 2007-05-01 Intel Corporation Method for configuration of notebook computer based on location
US7218634B1 (en) 2000-10-10 2007-05-15 Nortel Networks Limited Assisted power-up and hand-off system and method
US7675938B2 (en) 1999-12-13 2010-03-09 Broadcom Corporation Flexible upstream PHY burst profile parameters to improve performance of short bursts in impulse noise

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6504828B1 (en) 1999-03-11 2003-01-07 Telefonaktiebolaget Lm Ericsson (Publ) Adaptive handoff algorithms for mobiles operating in CDMA systems
US7260638B2 (en) * 2000-07-24 2007-08-21 Bluesocket, Inc. Method and system for enabling seamless roaming in a wireless network
JP4205840B2 (en) * 2000-07-31 2009-01-07 富士フイルム株式会社 The positive photosensitive thermosetting resin composition, transfer material, and an image forming method
KR20020055848A (en) * 2000-12-29 2002-07-10 박종섭 Dynamic ip address management method using radius server
KR100397127B1 (en) * 2001-09-04 2003-09-06 주식회사 현대시스콤 Mobile telecommunication network and method for operating call the same

Patent Citations (54)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0758771A (en) 1993-08-12 1995-03-03 Sharp Corp Address managing device
US6144653A (en) 1993-11-01 2000-11-07 Telefonakteibolaget Lm Ericsson Method for communicating in a wireless communication system
JPH09331580A (en) 1996-06-13 1997-12-22 Toshiba Corp Radio communication system provided with message transmission service function
JPH11103320A (en) 1997-08-01 1999-04-13 Toshiba Corp Mobile computer system, mobile computer managing device, mobile information managing device and communication control method
US7006472B1 (en) 1998-08-28 2006-02-28 Nokia Corporation Method and system for supporting the quality of service in wireless networks
US6385451B1 (en) 1998-09-14 2002-05-07 Nokia Mobile Phones Limited Handover between mobile communication networks
US20030076808A1 (en) * 1998-09-17 2003-04-24 Mcniff Peter Gerald System and method for mobile computing device registration with a service node
US20020098840A1 (en) 1998-10-09 2002-07-25 Hanson Aaron D. Method and apparatus for providing mobile and other intermittent connectivity in a computing environment
US6735202B1 (en) 1998-11-13 2004-05-11 Lucent Technologies Inc. Mobility management techniques for use in an internet protocol-based multimedia mobile network
US6766168B1 (en) 1999-02-12 2004-07-20 Lg Information & Communications, Ltd. Packet data service network in a mobile radio communication network and method of operating a packet data service using the packet data service network
KR20000056076A (en) 1999-02-12 2000-09-15 서평원 Packet Data Service Providing System in Mobile Communication System and Operating Method using the same of
WO2000060811A1 (en) 1999-04-07 2000-10-12 Telefonaktiebolaget Lm Ericsson (Publ) Mobile terminal sleep phase assignment and announcement in a wireless local area network
US6704789B1 (en) 1999-05-03 2004-03-09 Nokia Corporation SIM based authentication mechanism for DHCPv4/v6 messages
US6665713B1 (en) * 1999-06-08 2003-12-16 Nec Corporation Topology information automatic configuration method and its topology information automatic configuration system
US6590880B1 (en) 1999-10-15 2003-07-08 Nokia Corporation Apparatus, and associated method, for facilitating communication handover in packet radio communication system
US7675938B2 (en) 1999-12-13 2010-03-09 Broadcom Corporation Flexible upstream PHY burst profile parameters to improve performance of short bursts in impulse noise
US20010024443A1 (en) 1999-12-20 2001-09-27 Fredrik Alriksson Mobile IP for mobile Ad Hoc networks
US6982967B1 (en) 2000-06-29 2006-01-03 Cisco Technology, Inc. Methods and apparatus for implementing a proxy mobile node in a wireless local area network
US20020062388A1 (en) 2000-09-12 2002-05-23 Ogier Richard G. System and method for disseminating topology and link-state information to routing nodes in a mobile ad hoc network
US7218634B1 (en) 2000-10-10 2007-05-15 Nortel Networks Limited Assisted power-up and hand-off system and method
CA2395638A1 (en) 2000-10-26 2002-05-02 Samsung Electronics Co., Ltd. Handover method for mobile station having mobile ip address in mobile communication system
CA2397966A1 (en) 2000-11-21 2002-05-30 Samsung Electronics Co., Ltd. Regional tunnel management method in a mobile communication system using mobile ip
JP2002186010A (en) 2000-12-13 2002-06-28 Mitsubishi Electric Corp Mobile node position management method and network system
US20040068571A1 (en) * 2001-02-06 2004-04-08 Kalle Ahmavaara Access system for an access network
US20020114293A1 (en) 2001-02-16 2002-08-22 Lila Madour Mobile IP mobility management at dormant hand-over in cdma ip based cellular packet-data network
US20040082312A1 (en) * 2001-02-19 2004-04-29 O'neill Alan W Communications network
US20020118656A1 (en) 2001-02-27 2002-08-29 Prathima Agrawal Dynamic forward assignment of internet protocol addresses in wireless networks
US20020141361A1 (en) 2001-04-03 2002-10-03 Lila Madour Mobile IP registration in selected inter-PDSN dormant hand-off cases in a CDMA2000-based cellular telecommunications network
JP2002344479A (en) 2001-05-16 2002-11-29 Kddi Corp Data transfer method of mobile ip
CN1413034A (en) 2001-10-17 2003-04-23 阿尔卡塔尔公司 Network calling system and method
CN1424859A (en) 2001-12-10 2003-06-18 株式会社Ntt都科摩 Mobile communication system, method, mobile terminals and base stations
US20030142642A1 (en) 2002-01-31 2003-07-31 Prathima Agrawal Dynamic assignment and validation of IP addresses in wireless IP networks
JP2003274438A (en) 2002-03-18 2003-09-26 Victor Co Of Japan Ltd Wireless terminal, line controller, and ip wireless phone system
US20030185236A1 (en) 2002-03-27 2003-10-02 Hitachi, Ltd. Method and apparatus for translating protocol
US20040002333A1 (en) 2002-06-26 2004-01-01 Neufeld Arthur J. Fast reacquisition after long sleep
US20040203765A1 (en) * 2002-06-27 2004-10-14 Kaustubh Das Continuous mobility across wireless networks by integrating mobile IP and GPRS mobility agents
US20040013111A1 (en) * 2002-07-16 2004-01-22 Stefano Faccin Apparatus, and associated method, for providing router advertisment information to a mobile node in a radio IP system
WO2004021728A2 (en) 2002-08-30 2004-03-11 Nokia Corporation Mobile unit attachment/update to cellular communication network
US20040203596A1 (en) * 2002-08-30 2004-10-14 Srinivas Sreemanthula Mobile unit attachment / update to cellular communication network
US20040157607A1 (en) * 2002-09-10 2004-08-12 Soo-Hwan Kim Method and system for employing common data location register shared between public and private networks in high-speed wireless data system
JP2004112148A (en) 2002-09-17 2004-04-08 Toshiba Corp Mobile communication terminal
JP2004120171A (en) 2002-09-25 2004-04-15 Sony Corp Radio communication system, radio communication method, radio communication unit, radio terminal
US20040122976A1 (en) * 2002-10-24 2004-06-24 Ashutosh Dutta Integrated mobility management
US20040085957A1 (en) 2002-11-01 2004-05-06 Sanjeev Verma Apparatus and method for providing IP connectivity to mobile nodes during handover
US20040179532A1 (en) 2003-03-10 2004-09-16 Pascal Thubert Arrangement for traversing an IPv4 network by IPv6 mobile routers
US20040235536A1 (en) 2003-04-29 2004-11-25 Samsung Electronics Co., Ltd. Method for setting sleep interval in a broadband wireless access communication system
US20040218556A1 (en) 2003-04-30 2004-11-04 Samsung Electronics Co., Ltd. System and method for controlling state transition in sleep mode and awake mode in a broadband wireless access communication system
US20040266436A1 (en) * 2003-06-27 2004-12-30 Nokia Corporation Handover
US20050025164A1 (en) * 2003-07-16 2005-02-03 Telefonaktiebolaget L M Ericsson (Publ) Seamless hand-off of mobile node to a wireless local area network (WLAN)
US20050027834A1 (en) 2003-07-29 2005-02-03 Sbc Knowledge Ventures, L.P. Bi-level addressing for internet protocol broadband access
US20050130660A1 (en) 2003-12-02 2005-06-16 Samsung Electronics Co., Ltd. Inter-technology handoff method in an IP-based wireless communication system
US20050165953A1 (en) 2004-01-22 2005-07-28 Yoshihiro Oba Serving network selection and multihoming using IP access network
US20050213539A1 (en) 2004-03-29 2005-09-29 Ashutosh Dutta Fast handoff using GPS technology for mobile telematics
US7213057B2 (en) * 2004-03-31 2007-05-01 Intel Corporation Method for configuration of notebook computer based on location

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
IEEE "Part 16: Air Interface for Fixed and Mobile Broadband Wireless Access Systems-Amendment for Physical and Medium Access Control Layers for Combined Fixed and Mobile Operation in Licensed Bands", IEEE 802. 16e-03/07r5, IEEE 802.16 TGe working Document, Dec. 9, 2003.
IEEE "Part 16: Air Interface for Fixed and Mobile Broadband Wireless Access Systems—Amendment for Physical and Medium Access Control Layers for Combined Fixed and Mobile Operation in Licensed Bands", IEEE 802. 16e-03/07r5, IEEE 802.16 TGe working Document, Dec. 9, 2003.
Kim, Y. et al. "Management of Sleep Windows Size during Handover", IEEE C802.16E-04/75, IEEE 802.16 Broadband Wireless Access Working Group, May 10, 2004.
Kitroser, I. et al. "IEE802.16e Sleep Mode", IEEE C802.16e-03/15, IEEE 802.16 Broadband Wireless Access Working Group, Mar. 6, 2003.
Son, Y.M., "Sleep Mode Operation During Handoff," IEEE 802.16 Broadband Wireless Access Working Group, IEEE 802.16e03/49, Sep. 4, 2003.

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100195598A1 (en) * 2007-09-18 2010-08-05 Wei Wang accounting method for ultra mobile broadband access network
US8107976B2 (en) * 2007-09-18 2012-01-31 Zte Corporation Accounting method for ultra mobile broadband access network
US20090104910A1 (en) * 2007-10-17 2009-04-23 Samsung Electronics Co. Ltd. Apparatus and method for processing handover in a wireless communication system
US9237488B2 (en) * 2007-10-17 2016-01-12 Samsung Electronics Co., Ltd. Apparatus and method for processing handover in a wireless communication system
KR101481030B1 (en) * 2007-10-17 2015-01-09 삼성전자주식회사 Apparatus and method for handover processing in wireless communication system
US8615655B2 (en) * 2009-01-22 2013-12-24 Check Point Software Technologies, Ltd. Methods and devices for packet tagging using IP indexing via dynamic-length prefix code
US20100183014A1 (en) * 2009-01-22 2010-07-22 Check Point Software Technologies, Ltd. Methods and devices for packet tagging using ip indexing via dynamic-length prefix code
US8266257B1 (en) * 2009-09-01 2012-09-11 Symantec Corporation Systems and methods for reducing the amount of time required to reconnect to a computing network
US20160135069A1 (en) * 2013-07-12 2016-05-12 Lg Electronics Inc. Method and apparatus for transmitting indication of cell coverage in wireless communication system
US20170048725A1 (en) * 2015-08-12 2017-02-16 Samsung Electronics Co., Ltd Method and apparatus for self-configuration and self-optimization in a wireless communication system

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